Arch for the fire boxes of boilers



Jan. 16, 1923.

W.1. STOOP.

ARCH FOR THE FIRE BOXES 0F BOILERS.

3 SHEESWSHEET 2.

FILED DEC. 30, i920.

w QQ Q T @l fQQJJfM/M Jan. 16, 1923.

W. J. STOOP.

ARCH FOR THE FIRE BoxEs 0F BOILERS.

3 SHEETS-SHEET 3.

FILED DEC. 30, 1920.

fv/A NNN- Patented Jan. 16, 1923.

PATENT OFFICE.

WILLIAM'L STOOP, 0F WHEELING, WEST VIRGINIA.

ARCH ron THE man norms or BOILEns.

Application filed December 30, 1920. Serial No'. 433,969.

To @ZZ/whom it may concern.'

Be it known that I, WILLIAM J. STooP, a citizen of the United vStates of America,

f and resident of-Wheeling, county of Ohio and State of West Virginia, have invented certain new ndmseful Improvements in Arches for'the Fire Boxes of Boilers, of which the following is a specification.

This invention relates broadly to lire,- boxes for water-tube boilers, and more specifically to a suspended arch for such fireboxes. V

The primary object. of the invention is to provide an improved arch for the fire-boxes of water-tube boilers, the same being so constructed that it possesses unusual capability of resisting the deteriorating effects of the intense'heat to which such arches are subjected.

A further object is to provide an archhaving improved means whereby it is maintained in a relatively cool condition, with the end in view to greatly prolong its serviceable life. Y

A still further object is to provide, in association with such arch, improved means whereby the arch is supported in a suspended position.

With these and other important objects in view, the invention resides inthe features of construction, arrangement of parts and combinations of elements which will hereinafter be fully described, reference being had to the accompanying drawings, in whichy l Figure 1 is a longitudinal section of a firebox' embodying my invention; l

Figure 2 is an enlarged section taken sub-- stantially on the line 2-2, Fig. l, showing in top plan the arch-facing;

Figure 3 is an enlarged longitudinal section of the arch, illustrating the suspension means; and- Figure 4 is an enlarged transverse sec-l tion of a fragmentary portion of the arch, said section being taken approximately on line 4 4, Fig. 3.

Referring tosaid drawings, in which like designating characters distinguish like parts throughout the several viewso 1 indicates the front wall, 2 the muddrum, and 3 the tubes of a boiler of a more or less familiar'type, said front Wall hav ing therein an opening or passage 4 through which fuel is introduced into the fire-box 5. As herein shown, said passage 4 is fitted with a gas b urner 40, but it is obvious that an--oil burner 4may be substituted for saidv gas burner, or that coal `may be employed as fuel either alone or in conjunction with gas..

Overlying the fire-box 5 and supported at its outer end bythe front wall l is an arch, designated generally by the numeral 6, which constitutes the present invention.

vSaid arch, which is of the type generally termed flat, comprises an I-beam support 7 which is disposed transversely of the boiler setting at a suitable distance from said front wall l and which has attached thereto the inner ends of la plurality of relatively-spaced parallel bars 8.` Said bars,

which are slightly inclined 'from the horizontal in an upward and inward direction,

have their outer ends resting upon the top of said wall 1, orupon an angle-bar flange 9 carried bythe inner side-wall of a main air-supply conduit 10 which surmounts said` Wall, asshown. The inner end portion of each of said bars 8 carries thereon, or has formed integral therewith, a hanger-lug 11 which seats in overlying relation to one of the bottom vflanges ofthe I-beam 7; and a second hanger 12, detachablyl carried by the bar 8, seats uponv the opposite bottoinflange of said I-'beam in opposing relation to said hanger l1,V said hangers cooperating with l said I-beam for suspending said inner end of saidbar.

Each bar 8 is, generally speaking, ofllbeam form, l having extending throughout its length a base portion providing opposite horizontal flanges 8a; and disposed in suspended relation to said `flanges is a pluralityof parallel courses of alined heavy blocks 13,14 andl composed of a refractory material which will successfully resist A high temperatures, Said blocks are arranged to form an approximately horizontal flat wall whichconstitutes a facing for the arch adapted to be directly exposed to the heat lan'd flames resulting from combustion 'of the fuolwithin the fire-box 5. V The upper portions ofthe blocks 13, 14 and l5 of each course have a width approximating the distance between adjacent bars 8, and each of said blocks is channeled longitudinally on opposite sides to provide I downwardly-'facing shoulders 16 which rest upon the flanges 8a of adjacent bars, whereby said blocks are suspended. The blocks of each course have the sides of .their lower bodyportions'disposed in meeting or abutupon one side of the'blocks of each course and received within channels 18 provided therefor in the blocks of the neXtadjacent course, are preferably provided.

The alined blocks 13, 14 and 15 of each' course are secured against relative movement by means of a tie-rod 19 directed through alined holes 20 provided therefor in said blocks, said rods having nuts 21 threaded upon their opposite ends and received in yrecesses 22 provided in the opposite end-blocks 13 and 15, which recesses are designed to be lled with a suitable refractory material for protecting said nuts and the ends of the rod from the intense heat to which they would be subjected if exposed. As is-obvious, any number of the intermediate blocks 14 re-V quired by arches of different lengths may be employed.

The blocks are designed to be cooled by a constantly fiowing current of cold air di* rected therethrough, each thereof having therein a pair of parallel air-ducts, and the ducts of adjacent alined blocks being disposed in registering relation. The outer end block 13 .has leading to one -of its said ducts13a from the main air-supply conduit 10 a conducting tube 23. Air from said conduit thus passes through said tube 23 to said duct- 13a, thence through the latter' to the therewith registering duct 14 of block 14, thence to the therewith registering duct 15 of block 15. Said duct 152L communicates adjacent to the inner end of 'block 15 with the parallel return duct 15b of said block through a connecting cross passage 15. Thus, air passes from said duct 152L to the duct 15b, thence to vthe therewithr registering return duct 14b of block 14, thence to the therewith registering return duct 13b of block 13. The said duct 13b has its outer endcurved and opening upward through the top of block 13, as shown at 24, for discharging air into the open space 25 above the course. Said open space is bounded at oppositesides by the ba`rs8 and is closed at its top by a crown 26 composed of suitable blocks or tile which overlies the said bars and extends inward from the inner wall of. said conduit 10 and terminates more or less closely adjacent to,the I-beam 7. Each of.

point. Obviously, the heatedair may be conducted by said duct or passage 28 to the interior of the factory for heating the latter when such is desirable.

I-beams 29 located at a suitable distance in front of and parallel to the beam 7 form supports for an upright front wall 30 and also for the outer ends of cross-beams 31 which have their opposite ends supported by said beam 7. Surmounting said cross-beams 31 and the beam 7 is the top wall 32 of the arch, which joins with an inner end wall 33 carried by the inner end of the arch facing and the corresponding ends of the supporting bars 8.

A suitable cover-plate, as 34, extends from the top of the conduit 10 to the outermost of the beams 29, as shown.

From the foregoing it will be manifest that my invention provides a simple arch and arch-suspension structure for the fire-boxes of water-tube boilers, and that said structurel includes an archfacing associated with aircirculating means whereby it is at all times maintained in a relatively cool condition for enabling it to withstand the high temperatures generated in the fire-box.

What is claimed is- 1. An arch for the fire-boxes of boilers comprising a plurality of relatively-spaced parallel supporting bars arranged in approximately horizontal position over thc fire-box, an arch facing consisting of a plurality of courses of alined blocks, each course occupying the space between adjacent bars and having the blocks thereof receiving support from the latter, the blocks of each vcourse having therein passages which communicate to form a continuous ingoing and return duct for air whereby said blocks arc cooled, an air-supply conduit located adja' cent to the outer ends of said courses and having communication with the inlet end of the ingoing branch of each\ cooling duct, said cooling ducts having their discharge ends opening above said courses adjacent to the rear ends of the latter, and passages for conducting air discharged from said ducts away from the arch.

2. An arch for the fire-boxes of boilers, comprising a plurality of relatively-spaced parallel supporting bars arranged in approximately horizontal position over the fireboX, and having their-outer ends supported over the front wall of the latter, means snpporting the inner ends of said bars, an arch facing suspended yfrom said bars, said facing consisting of a plurality of courses of alined blocks, each course having the upper portions of opposite lateral edges ofthe blocks thereof interengaged with adjacent bars and having thel lower lateral edges of said blocks disposed in abutting relation to those of `adjacent courses, said courses having therein ducts for the passage of air whereby they are cooled, an air-supply conduit in communication with the inlet end of each of said ducts, and air passages leading from the discharge ends' of said ducts to the atmosphere.

3. In an arch for the fire-boxes of boilers, relatively-spaced parallel bars, means supporting said bars in approximately horizontal position over the fire-box, an arch facing comprising a plurality of courses of blocks supported by the base portions of said bars, the blocks of .each course being in alined relation and occupying the space between the base portions of adjacent bars, and the blocks of adjacent courses being in abutting relation below said bars, each course having therein connected ingoing and return ducts for the passage of air whereby they are cooled, an air-supply conduit in communication with the inlet end of each in! going duct, a crown supported by said bars at a distance above said facing whereby inf termediate passages are provided, the outlets of said return ducts opening into said passages, and means for conducting air outward from said passages.

4.-. In an arch for the fire-boxes of boilers, relatively spaced parallel bars, means supporting said bars in approximately horizon- A tal position over the ire-box, an arch facing consisting of a plurality of courseslof blocks supported by the base portions of said bars, the blocks of each course being in alined relation and occupying the space between the base portions of adjacent bars, and the blocks of adjacent courses being disposed in abutting relation below said bars, each of Said courses having therein connected ingoing and return ducts for the passage of air wherebyl they are cooled, an air-supply conduit in communication with the inlet end` ofeach ingoing duct, a crown supported'by said bars at a distance above said facing whereb intermediate passages are provided, the outlets of saidreturnlducts opening into the outer ends of said passages, an enclosed chamber over said crown, said passages opening into said chamber, and means for conducting air from said chamber.

5. In an arch for the fire-box of a boiler, a plurality of relatively-spaced parallel bars, means supporting said bars in approximately horizontal position over the tire-box, an arch facing` suspended lfrom said bars and consisting of a plurality of courses of alined blocks, each bar having opposite base flanges and the blocks of each course having their upper lateral .edge portions channeled for.

Acrown supported above said facing whereby intermediate passages are formed, air ducts in said courses having their discharge ends opening into said passages, an air-supply conduit opening into each duct, a chamber with which said passages communicate, and air-conducting means leading from said chamber.

6. An arch for the fire-boxes of boilers, comprising a plurality of parallel relativelyspaced bars supported at their outer ends adjacent to the front wall of the {ire-box, said bars occupying approximately horizontalZ positions, .an I-beam disposed transversely adjacent to the inner yends of said bars and having saidends suspended therefrom, an arch facing suspended from said bars, said facing comprising courses of alined blocks interposed between said bars, each course having -the blocks thereof interi engaged at opposite sides with adjacent bars,

-bars occupying*approximately horizontal p0- sitions, a supporting member located adjacent the inner ends of said bars and having said inner ends suspended therefrom, an arch facing suspended fromsaid bars, said facing comprising courses of alined blocks, each course having the blocks thereof inabutting relation to those of adjacent courses, a crown overlying said bars whereby air. passages intermediate the v,bars-are provided, an .open chamber with which said vpassagescommunicate at their inner ends,

each course .of blocks havingctherein a duct for the passage of air whereby it is cooled,

. said ducts being arranged to discharge into the outer end portion of said passages, and means supplying air to said ducts.

In testimony whereof, I affix-my signature in presence of two subscribing witnesses.

WILLIAM J. sTooP.

Witnesses:

W. B. WILSON, H. E. DUNLAP. 

